Work-table for presses and the like.



R. J. GIBBON. WORK TABLE FOB PBESSES AND THE LIKE. APPLICATION TILED MAY 8, 1907.

927,458; Patented July 6, 1909.

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WORK TABLE FOB; PBESSES AND THE LIKE.

APPLICATION FILED MAY 8. 1907.

927,458. I Patented Ju1y 6,'1909. I

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Q Q Q q o 'l a; Q n? 5 9 %1 (Q N F R 8 v r 8 f II g g F i J I 8 v 1 2* E F 3: I r61 E q f 1 Fl r? I I nto Attest W nve r UNITED STATES PATENT OFFICE.

ROBERT J'. GIBBON, OF CHICAGO, ILLINOIS, ASSIGNOR TO F. WESEL MANUFACTURING COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

WORK-TABLE FOR PRESSES AND THE LIKE.

Specification of Letters Patent.

Patented July 6, 1909.

Original application filed January 10, 1907, Serial No. 351,604. Divided and this application filed May 8, 1907. Serial No. 372,585.

To all whom it may concern:

Be it known that I, ROBERT J. GiBBoN, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in WorkTables for Presses and the Like, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to work tables or attachments which are adapted to be used in connection with apparatuses requiring the work to be presented and withdrawn, particularly hydraulic presses. Its object is to provide means whereby the work may be deivered into and returned from the press automatically and at the same timebe under the manual control of the operator.

In the drawings the im 7 roved mechanism embodying the invention as been illustrated in connection with a hydraulic press of the character described and shown in an application for Letters Patent filed by me on January 10, 1907, Serial No. 351,604.

In said drawings: Figure 1 is a sectional view of a hydraulic press containing the improvements, certain portions of the mechan- 1SII1 of the press being omitted. Fig. 2 is a view, partly in elevation and partly in section, on a much larger scale, showing the front portion of the work plate together with its lateral sup ort and the mechanism for moving the woi k plate, and, Fig. 3 is a detail plan view, partly broken away, of the work plate and its support.

The Work table broadly considered consists of a sup orting shelf or bracket, a work plate which s ides from the support into the 1 machine between the ram and its abutment and back again to the support, and mechanism for sliding said plate. In the V resent case the support or shelf 110 is bolte to the lower laten 14 from which it extends toward t e front of the machine. This su port carries the work plate 111 suitab y guided and in such a position that it may slide from the shelf 1 10 to a position between the upper and lower platens. This plate is moved horizontally from its position upon the lateral shelf to its position between the platens by means of mechanism which is set 1n operation by a handle 120 or some other equivalent means and which is automatically stopped in both of its resting positions by automatic means. This mechanism and automatic means will now be described.

Referring particularly to Figs. 2 and 3, it will be seen that a shaft 113 journaled in suitable bearings upon the shelf 110 is pro vided with a friction clutch, one member 112 of which is rigidly keyed thereto and rotates therewith. The other member 115 of the clutch is slidably secured upon a shaft 114 j ournaled in bearings 118 upon the shelf 110 and arranged axially with respect to the shaft 113. The clutch member 115, which is thus movable longitudinally upon the shaft 114 and rotates therewith, is engaged by a forked member 116 upon a slide rod 117 to which the handle or trigger 120 is pivoted, a spring 124 being provided which con stantly urges the two clutch members into engagement. The shaft 114 is provided with end thrust collars 125 and is also provided with a worm 129 (Fig. 1) rigidly keyed thereto. This worm operates a Worm gear 130 (Fig. 1) upon a vertical shaft 131 having a bearing 132, a worm gear casing being ref erably employed and which may be illed with oil for lubricating purposes. Upon the end of the shelf remote from the worm gearing is provided an adjustable bearing 133 which carries a vertical shaft 134 to which a sprocket 135 is secured, which sprocket is in line with a sprocket 136 on the shaft 131. Around these sprockets runs an endless chain 137 which is provided with a special link 138 containing a ivot pin adapted to rotate in a block 139 s idably connected to the work plate in a guide 140. It will thus be seen that when the two clutch members 114 and 115 are in engagement, the sprocket chain will travel around its sprockets and reciprocate table 111. The clutch members are normally withheld from engagement, however, against the action of the spring 124, by means of a cam 122 which cooperates with a projection 121 upon the handle or trigger 120. This cam (Fig. 3) preferably consists of a long strip slidable in the lateral support 110 and provided at each end with a pro ection adapted to be engaged, when the table is near either of its limiting positions, by a lug 123 rigidly secured to the underside of the table. A portion of the strip 122 is cut away to form what may be referred to as a cam surface.

The operation of the mechanism is as follows: When the table is resting in either of its positions, the projection 121 rests at one side or the other of the cut in the slide 122. After the handle or trigger 120 has been depressed, the spring 124 will draw in the slide rod 1.17 thus throwing in the clutch and drawing the projection 121 underneath the cam or slide 122. As soon however, as the table has reached the limit of its movement, the projection 123 thereon will move the slide so that the projection 121 will register with the cut in the slide. At this point, the trigger 1.20 together with the projection 121 will be forced upwardly by a spring 127 underlying the trigger 120 so that the projection 121, riding as it does upon the cam surface of the strip 122, will, as the latter continues to move, be drawn out of the cut therein. This, as will be obvious, will serve to draw back the sliding rod 117 until the clutch members have been disengaged and the movement of the table checked. It will be clear, moreover, that the table will be automatically checked by means of this mechanism as it moves into the machine between the platens and also as it moves back again upon its lateral support.

It will be understood of course that the drawings are merely explanatory of the invention, that many changes may be made in the construction shown and described with out departing from the invention and that the improvements may be applied to various kinds of apparatuses.

I claim as my invention:

1. In an apparatus requiring work to be presented and withdrawn, the combination of a work plate, means to slide the plate into the apparatus, and means including a cam controlled by the plate to disconnect the first-named means and plate and check the movement of the plate.

2. In an apparatus requiring work to be presented and withdrawn, the combination of a work plate, means to slide the plate into the apparatus, a handle to. operatively connect said means and plate, and means includ ing a cam controlled by the plate to disconnect the first-named means and plate and check the movement of the plate.

3. In an apparatus requiring work to be presented and withdrawn, the combination 1 of a work plate, means to slide the plate into the apparatus, a pivoted handle to operatively connect said means and plate, and means controlled by the movement of the plate to move said handle and thereby disconnect the first-named means and plate and check the movement of the plate.

4. In an apparatus requiring work to be presented and withdrawn, the combination of a work plate, a lateral support, means to slide the plate from the support into the apparatus and back again, and means including a cam controlled by the plate to disconnect the first-named means and plate and check the movement of the plate when it has reached its proper position in the apparatus and also when it has moved back. again upon the lateral support.

5. In an apparatus requiring work to he presented and withdrawn, the combination of a work plate, means operating continuously to slide the plate into the apparatus, a clutch through which the plate may be connected with and disconnected from said means, a lever to effect the engagement of the clutch members, and a cam to effect automatically their disengagement.

6. In an apparatus requiring work to be presented and withdrawn, the combination of a work plate, a clutch, a chain in operative connection with the driven member of the clutch, a sliding connection between the chain and plate, a hand lever to effect the engagement of the clutch members, a sliding piece having a cam surface adapted to operate on the lever, and means upon the plate toengage and move said piece whereby the lever is operated to check the movement of the plate.

7. In an apparatus requiring work to be presented and withdrawn, the combination of a work plate, means to slide the plate into the. apparatus, a pivoted handle to place the work plate under the control of said means, and a cam operating upon the handle through which. the plate is adapted to check its own movement.

This specification signed and witnessed this 3rd day of February 1907.

:tOBERT J. GIBBON.

Signed in the presence of B. O. HENNING, H. H. Ronnn'rson. 

